Verifiable Randomness Functions

// derive PDA
[vrfAuthorityKey, vrfAuthoritySecret] =
  anchor.web3.PublicKey.findProgramAddressSync(
    [Buffer.from("VRFAUTH")],
    program.programId,
  );

pub struct VrfAccountData {
    /// The current status of the VRF account.
    pub status: VrfStatus,
    /// Incremental counter for tracking VRF rounds.
    pub counter: u128,
    /// Onchain account delegated for making account changes. <-- This is our PDA
    pub authority: Pubkey,
    /// The OracleQueueAccountData that is assigned to fulfill VRF update request.
    pub oracle_queue: Pubkey,
    /// The token account used to hold funds for VRF update request.
    pub escrow: Pubkey,
    /// The callback that is invoked when an update request is successfully verified.
    pub callback: CallbackZC,
    /// The number of oracles assigned to a VRF update request.
    pub batch_size: u32,
    /// Struct containing the intermediate state between VRF crank actions.
    pub builders: [VrfBuilder; 8],
    /// The number of builders.
    pub builders_len: u32,
    pub test_mode: bool,
    /// Oracle results from the current round of update request that has not been accepted as valid yet
    pub current_round: VrfRound,
    /// Reserved for future info.
    pub _ebuf: [u8; 1024],
}

#[zero_copy(unsafe)]
#[repr(packed)]
pub struct CallbackZC {
    /// The program ID of the callback program being invoked.
    pub program_id: Pubkey,
    /// The accounts being used in the callback instruction.
    pub accounts: [AccountMetaZC; 32],
    /// The number of accounts used in the callback
    pub accounts_len: u32,
    /// The serialized instruction data.
    pub ix_data: [u8; 1024],
    /// The number of serialized bytes in the instruction data.
    pub ix_data_len: u32,
}

// example
import Callback from '@switchboard-xyz/solana.js'
...
...
 
const vrfCallback: Callback = {
      programId: program.programId,
      accounts: [
        // ensure all accounts in consumeRandomness are populated
        { pubkey: clientState, isSigner: false, isWritable: true },
        { pubkey: vrfClientKey, isSigner: false, isWritable: true },
        { pubkey: vrfSecret.publicKey, isSigner: false, isWritable: true },
      ],
			// use name of instruction
      ixData: vrfIxCoder.encode("consumeRandomness", ""), // pass any params for instruction here
    }

// Create Switchboard VRF
[vrfAccount] = await switchboard.queue.createVrf({
  callback: vrfCallback,
  authority: vrfAuthorityKey, // vrf authority
  vrfKeypair: vrfSecret,
  enable: !queue.unpermissionedVrfEnabled, // only set permissions if required
});

// from the Switchboard program
// https://github.com/switchboard-xyz/solana-sdk/blob/fbef37e4a78cbd8b8b6346fcb96af1e20204b861/rust/switchboard-solana/src/oracle_program/instructions/vrf_request_randomness.rs#L8
 
pub struct VrfRequestRandomness<'info> {
    #[account(signer)]
    pub authority: AccountInfo<'info>,
    #[account(mut)]
    pub vrf: AccountInfo<'info>,
    #[account(mut)]
    pub oracle_queue: AccountInfo<'info>,
    pub queue_authority: AccountInfo<'info>,
    pub data_buffer: AccountInfo<'info>,
    #[account(
        mut,
        seeds = [
            b"PermissionAccountData",
            queue_authority.key().as_ref(),
            oracle_queue.key().as_ref(),
            vrf.key().as_ref()
        ],
        bump = params.permission_bump
    )]
    pub permission: AccountInfo<'info>,
    #[account(mut, constraint = escrow.owner == program_state.key())]
    pub escrow: Account<'info, TokenAccount>,
    #[account(mut, constraint = payer_wallet.owner == payer_authority.key())]
    pub payer_wallet: Account<'info, TokenAccount>,
    #[account(signer)]
    pub payer_authority: AccountInfo<'info>,
    pub recent_blockhashes: AccountInfo<'info>,
    #[account(seeds = [b"STATE"], bump = params.state_bump)]
    pub program_state: AccountInfo<'info>,
    pub token_program: AccountInfo<'info>,
}

// our client program
use switchboard_v2::VrfRequestRandomness;
use state::*;
 
pub fn request_randomness(ctx: Context<RequestRandomness>, request_params: RequestRandomnessParams) -> Result <()> {
	let switchboard_program = ctx.accounts.switchboard_program.to_account_info();
 
	let vrf_request_randomness = VrfRequestRandomness {
	    authority: ctx.accounts.vrf_state.to_account_info(),
	    vrf: ctx.accounts.vrf.to_account_info(),
	    oracle_queue: ctx.accounts.oracle_queue.to_account_info(),
	    queue_authority: ctx.accounts.queue_authority.to_account_info(),
	    data_buffer: ctx.accounts.data_buffer.to_account_info(),
	    permission: ctx.accounts.permission.to_account_info(),
	    escrow: ctx.accounts.switchboard_escrow.clone(),
	    payer_wallet: ctx.accounts.payer_wallet.clone(),
	    payer_authority: ctx.accounts.user.to_account_info(),
	    recent_blockhashes: ctx.accounts.recent_blockhashes.to_account_info(),
	    program_state: ctx.accounts.program_state.to_account_info(),
	    token_program: ctx.accounts.token_program.to_account_info(),
	};
 
	msg!("requesting randomness");
	vrf_request_randomness.invoke_signed(
	    switchboard_program,
	    request_params.switchboard_state_bump,
	    request_params.permission_bump,
	    state_seeds,
	)?;
 
...
 
Ok(())
 
}

// our client program
 
#[derive(Accounts)]
pub struct ConsumeRandomness<'info> {
    // vrf client state
    #[account]
    pub vrf_auth: AccountLoader<'info, VrfClientState>,
    // switchboard vrf account
    #[account(
        mut,
        constraint = vrf.load()?.authority == vrf_auth.key() @ EscrowErrorCode::InvalidVrfAuthorityError
    )]
    pub vrf: AccountLoader<'info, VrfAccountData>
}
 
pub fn handler(ctx: Context<ConsumeRandomness>) -> Result <()> {
    msg!("Consuming randomness!");
 
		// load the vrf account data
    let vrf = ctx.accounts.vrf.load()?;
		// use the get_result method to fetch the randomness results
    let result_buffer = vrf.get_result()?;
 
		// check if result buff is all 0's
    if result_buffer == [0u8; 32] {
        msg!("vrf buffer empty");
        return Ok(());
    }
 
    msg!("Result buffer is {:?}", result_buffer);
		// use the random value how you see fit
 
    Ok(())
}

// slice byte buffer to store the first value
let dice_roll = (result_buffer[0] % 6) + 1;

[dependencies]
anchor-lang = "0.28.0"
anchor-spl = "0.28.0"
switchboard-v2 = "0.4.0"

use anchor_lang::prelude::*;
use instructions::deposit::*;
use instructions::withdraw::*;
use instructions::init_vrf_client::*;
use instructions::get_out_of_jail::*;
use instructions::consume_randomness::*;
 
pub mod instructions;
pub mod state;
pub mod errors;
 
declare_id!("YOUR_KEY_HERE");
 
#[program]
mod burry_escrow {
 
    use crate::instructions::init_vrf_client::init_vrf_client_handler;
 
    use super::*;
 
    pub fn deposit(ctx: Context<Deposit>, escrow_amt: u64, unlock_price: f64) -> Result<()> {
        deposit_handler(ctx, escrow_amt, unlock_price)
    }
 
    pub fn withdraw(ctx: Context<Withdraw>) -> Result<()> {
        withdraw_handler(ctx)
    }
 
    pub fn init_vrf_client(ctx: Context<InitVrfClient>) -> Result<()>{
        init_vrf_client_handler(ctx)
    }
 
		pub fn get_out_of_jail(ctx: Context<RequestRandomness>, params: RequestRandomnessParams) -> Result<()>{
        get_out_of_jail_handler(ctx, params)
    }
 
    pub fn consume_randomness(ctx: Context<ConsumeRandomness>) -> Result<()>{
        consume_randomness_handler(ctx)
    }
}

// state.rs
#[account]
pub struct EscrowState {
    pub unlock_price: f64,
    pub escrow_amount: u64,
    pub out_of_jail: bool
}

// state.rs
 
#[repr(packed)]
#[account(zero_copy(unsafe))]
#[derive(Default)]
pub struct VrfClientState {
    pub bump: u8,
    pub result_buffer: [u8; 32],
		pub dice_type: u8, // 6 sided
    pub die_result_1: u8,
    pub die_result_2: u8,
    pub timestamp: i64,
    pub vrf: Pubkey,
    pub escrow: Pubkey
}

pub const VRF_STATE_SEED: &[u8] = b"VRFCLIENT";

use anchor_lang::prelude::*;
 
pub const ESCROW_SEED: &[u8] = b"MICHAEL BURRY";
pub const VRF_STATE_SEED: &[u8] = b"VRFCLIENT";
pub const SOL_USDC_FEED: &str = "GvDMxPzN1sCj7L26YDK2HnMRXEQmQ2aemov8YBtPS7vR";
 
#[account]
pub struct EscrowState {
    pub unlock_price: f64,
    pub escrow_amount: u64,
    pub out_of_jail: bool
}
 
#[repr(packed)]
#[account(zero_copy(unsafe))]
#[derive(Default)]
pub struct VrfClientState {
    pub bump: u8,
    pub result_buffer: [u8; 32],
		pub dice_type: u8, // 6 sided
    pub die_result_1: u8,
    pub die_result_2: u8,
    pub timestamp: i64,
    pub vrf: Pubkey,
    pub escrow: Pubkey
}

use anchor_lang::prelude::*;
 
#[error_code]
#[derive(Eq, PartialEq)]
pub enum EscrowErrorCode {
    #[msg("Not a valid Switchboard account")]
    InvalidSwitchboardAccount,
    #[msg("Switchboard feed has not been updated in 5 minutes")]
    StaleFeed,
    #[msg("Switchboard feed exceeded provided confidence interval")]
    ConfidenceIntervalExceeded,
    #[msg("Current SOL price is not above Escrow unlock price.")]
    SolPriceAboveUnlockPrice,
    #[msg("Switchboard VRF Account's authority should be set to the client's state pubkey")]
    InvalidVrfAuthorityError,
}

pub mod deposit;
pub mod withdraw;
pub mod init_vrf_client;
pub mod get_out_of_jail;
pub mod consume_randomness;

// in deposit.rs
...
let escrow_state = &mut ctx.accounts.escrow_account;
    escrow_state.unlock_price = unlock_price;
    escrow_state.escrow_amount = escrow_amount;
    escrow_state.out_of_jail = false;
...

if !escrow_state.out_of_jail {
      // get result
      let val: f64 = feed.get_result()?.try_into()?;
 
      // check whether the feed has been updated in the last 300 seconds
      feed.check_staleness(Clock::get().unwrap().unix_timestamp, 300)
      .map_err(|_| error!(EscrowErrorCode::StaleFeed))?;
 
      msg!("Current feed result is {}!", val);
      msg!("Unlock price is {}", escrow_state.unlock_price);
 
      if val < escrow_state.unlock_price as f64 {
          return Err(EscrowErrorCode::SolPriceAboveUnlockPrice.into())
      }
  }

use crate::state::*;
use crate::errors::*;
use anchor_lang::prelude::*;
use switchboard_v2::VrfAccountData;
 
#[derive(Accounts)]
pub struct InitVrfClient<'info> {
    #[account(mut)]
    pub user: Signer<'info>,
    // burry escrow account
    #[account(
        mut,
        seeds = [ESCROW_SEED, user.key().as_ref()],
        bump,
    )]
    pub escrow_account: Account<'info, EscrowState>,
    // vrf client state
    #[account(
        init,
        seeds = [
						VRF_STATE_SEED,
            user.key.as_ref(),
            escrow_account.key().as_ref(),
            vrf.key().as_ref(),
        ],
        payer = user,
        space = 8 + std::mem::size_of::<VrfClientState>(),
        bump
    )]
    pub vrf_state: AccountLoader<'info, VrfClientState>,
 
    // switchboard vrf account
    #[account(
        mut,
        constraint = vrf.load()?.authority == vrf_state.key() @ EscrowErrorCode::InvalidVrfAuthorityError
    )]
    pub vrf: AccountLoader<'info, VrfAccountData>,
    pub system_program: Program<'info, System>
}

pub fn init_vrf_client_handler(ctx: Context<InitVrfClient>) -> Result<()> {
    msg!("init_client validate");
 
    let mut vrf_state = ctx.accounts.vrf_state.load_init()?;
    *vrf_state = VrfClientState::default();
    vrf_state.bump = ctx.bumps.get("vrf_state").unwrap().clone();
    vrf_state.escrow = ctx.accounts.escrow_account.key();
    vrf_state.die_result_1 = 0;
    vrf_state.die_result_2 = 0;
    vrf_state.timestamp = 0;
    vrf_state.dice_type = 6; // sided
 
    Ok(())
}

use crate::state::*;
use crate::errors::*;
use anchor_lang::prelude::*;
use anchor_lang::solana_program::sysvar::*;
use switchboard_v2::{VrfAccountData, OracleQueueAccountData, PermissionAccountData, SbState, VrfRequestRandomness};
use anchor_spl::token::{TokenAccount, Token};
 
#[derive(Accounts)]
pub struct RequestRandomness<'info> {
    // PAYER ACCOUNTS
    #[account(mut)]
    pub user: Signer<'info>,
    #[account(mut,
        constraint =
            payer_wallet.owner == user.key()
            && switchboard_escrow.mint == program_state.load()?.token_mint
    )]
    pub payer_wallet: Account<'info, TokenAccount>,
    // burry escrow account
    #[account(
        mut,
        seeds = [ESCROW_SEED, user.key().as_ref()],
        bump,
    )]
    pub escrow_account: Account<'info, EscrowState>,
    // vrf client state
    #[account(
        mut,
        seeds = [
            VRF_STATE_SEED,
            user.key.as_ref(),
            escrow_account.key().as_ref(),
            vrf.key().as_ref(),
        ],
        bump
    )]
    pub vrf_state: AccountLoader<'info, VrfClientState>,
    // switchboard vrf account
    #[account(
        mut,
        constraint = vrf.load()?.authority == vrf_state.key() @ EscrowErrorCode::InvalidVrfAuthorityError
    )]
    pub vrf: AccountLoader<'info, VrfAccountData>,
    // switchboard accounts
    #[account(mut,
        has_one = data_buffer
    )]
    pub oracle_queue: AccountLoader<'info, OracleQueueAccountData>,
    /// CHECK:
    #[account(
        mut,
        constraint = oracle_queue.load()?.authority == queue_authority.key()
    )]
    pub queue_authority: UncheckedAccount<'info>,
    /// CHECK
    #[account(mut)]
    pub data_buffer: AccountInfo<'info>,
    #[account(mut)]
    pub permission: AccountLoader<'info, PermissionAccountData>,
    #[account(mut,
        constraint = switchboard_escrow.owner == program_state.key() && switchboard_escrow.mint == program_state.load()?.token_mint
    )]
    pub switchboard_escrow: Account<'info, TokenAccount>,
    #[account(mut)]
    pub program_state: AccountLoader<'info, SbState>,
    /// CHECK:
    #[account(
        address = *vrf.to_account_info().owner,
        constraint = switchboard_program.executable == true
    )]
    pub switchboard_program: AccountInfo<'info>,
    // SYSTEM ACCOUNTS
    /// CHECK:
    #[account(address = recent_blockhashes::ID)]
    pub recent_blockhashes: AccountInfo<'info>,
    pub token_program: Program<'info, Token>,
    pub system_program: Program<'info, System>
}

#[derive(Clone, AnchorSerialize, AnchorDeserialize)]
pub struct RequestRandomnessParams {
    pub permission_bump: u8,
    pub switchboard_state_bump: u8,
}

pub fn get_out_of_jail_handler(ctx: Context<RequestRandomness>, params: RequestRandomnessParams) -> Result <()> {
    let switchboard_program = ctx.accounts.switchboard_program.to_account_info();
    let vrf_state = ctx.accounts.vrf_state.load()?;
 
    let bump = vrf_state.bump.clone();
    drop(vrf_state);
 
		// build vrf request struct from the Switchboard Rust crate
    let vrf_request_randomness = VrfRequestRandomness {
        authority: ctx.accounts.vrf_state.to_account_info(),
        vrf: ctx.accounts.vrf.to_account_info(),
        oracle_queue: ctx.accounts.oracle_queue.to_account_info(),
        queue_authority: ctx.accounts.queue_authority.to_account_info(),
        data_buffer: ctx.accounts.data_buffer.to_account_info(),
        permission: ctx.accounts.permission.to_account_info(),
        escrow: ctx.accounts.switchboard_escrow.clone(),
        payer_wallet: ctx.accounts.payer_wallet.clone(),
        payer_authority: ctx.accounts.user.to_account_info(),
        recent_blockhashes: ctx.accounts.recent_blockhashes.to_account_info(),
        program_state: ctx.accounts.program_state.to_account_info(),
        token_program: ctx.accounts.token_program.to_account_info(),
    };
 
    let vrf_key = ctx.accounts.vrf.key();
    let escrow_key = ctx.accounts.escrow_account.key();
    let user_key = ctx.accounts.user.key();
    let state_seeds: &[&[&[u8]]] = &[&[
				&VRF_STATE_SEED,
        user_key.as_ref(),
        escrow_key.as_ref(),
        vrf_key.as_ref(),
        &[bump],
    ]];
 
    // submit vrf request with PDA signature
    msg!("requesting randomness");
    vrf_request_randomness.invoke_signed(
        switchboard_program,
        params.switchboard_state_bump,
        params.permission_bump,
        state_seeds,
    )?;
 
    msg!("randomness requested successfully");
 
    Ok(())
}

// inside consume_randomness.rs
use crate::state::*;
use crate::errors::*;
use anchor_lang::prelude::*;
use switchboard_v2::VrfAccountData;
 
#[derive(Accounts)]
pub struct ConsumeRandomness<'info> {
    // burry escrow account
    #[account(mut)]
    pub escrow_account: Account<'info, EscrowState>,
    // vrf client state
    #[account(mut)]
    pub vrf_state: AccountLoader<'info, VrfClientState>,
    // switchboard vrf account
    #[account(
        mut,
        constraint = vrf.load()?.authority == vrf_state.key() @ EscrowErrorCode::InvalidVrfAuthorityError
    )]
    pub vrf: AccountLoader<'info, VrfAccountData>
}

// inside consume_randomness.rs
 
pub fn consume_randomness_handler(ctx: Context<ConsumeRandomness>) -> Result <()> {
    msg!("Consuming randomness...");
 
    let vrf = ctx.accounts.vrf.load()?;
    let result_buffer = vrf.get_result()?;
 
    if result_buffer == [0u8; 32] {
        msg!("vrf buffer empty");
        return Ok(());
    }
 
		Ok(())
}

pub fn consume_randomness_handler(ctx: Context<ConsumeRandomness>) -> Result <()> {
    msg!("Successfully consumed randomness.");
 
    let vrf = ctx.accounts.vrf.load()?;
    let result_buffer = vrf.get_result()?;
 
    if result_buffer == [0u8; 32] {
        msg!("vrf buffer empty");
        return Ok(());
    }
		// new code
    let vrf_state = &mut ctx.accounts.vrf_state.load_mut()?;
    if result_buffer == vrf_state.result_buffer {
        msg!("result_buffer unchanged");
        return Ok(());
    }
 
		...
		...
}

pub fn consume_randomness_handler(ctx: Context<ConsumeRandomness>) -> Result <()> {
    msg!("Successfully consumed randomness.");
 
    let vrf = ctx.accounts.vrf.load()?;
    let result_buffer = vrf.get_result()?;
 
    if result_buffer == [0u8; 32] {
        msg!("vrf buffer empty");
        return Ok(());
    }
 
    let vrf_state = &mut ctx.accounts.vrf_state.load_mut()?;
    let dice_type = vrf_state.dice_type;
    if result_buffer == vrf_state.result_buffer {
        msg!("result_buffer unchanged");
        return Ok(());
    }
 
    msg!("Result buffer is {:?}", result_buffer);
 
    let dice_1 = result_buffer[0] % dice_type + 1;
    let dice_2 = result_buffer[1] % dice_type + 1;
 
    msg!("Current Die 1 Value [1 - {}) = {}!", dice_type, dice_1);
    msg!("Current Die 2 Value [1 - {}) = {}!", dice_type, dice_2);
 
		...
		...
}

pub fn consume_randomness_handler(ctx: Context<ConsumeRandomness>) -> Result <()> {
    msg!("Successfully consumed randomness.");
 
    let vrf = ctx.accounts.vrf.load()?;
    let result_buffer = vrf.get_result()?;
 
    if result_buffer == [0u8; 32] {
        msg!("vrf buffer empty");
        return Ok(());
    }
 
    let vrf_state = &mut ctx.accounts.vrf_state.load_mut()?;
    let dice_type = vrf_state.dice_type;
    if result_buffer == vrf_state.result_buffer {
        msg!("result_buffer unchanged");
        return Ok(());
    }
 
    msg!("Result buffer is {:?}", result_buffer);
 
    let dice_1 = result_buffer[0] % dice_type + 1;
    let dice_2 = result_buffer[1] % dice_type + 1;
 
    msg!("Current Die 1 Value [1 - {}) = {}!", dice_type, dice_1);
    msg!("Current Die 2 Value [1 - {}) = {}!", dice_type, dice_2);
 
    msg!("Updating VRF State with random value...");
    vrf_state.result_buffer = result_buffer;
    vrf_state.die_result_1 = dice_1;
    vrf_state.die_result_2 = dice_2;
    vrf_state.timestamp = Clock::get().unwrap().unix_timestamp;
 
    if dice_1 == dice_2 {
        msg!("Rolled doubles, get out of jail free!");
        let escrow_state = &mut ctx.accounts.escrow_account;
        escrow_state.out_of_jail = true;
    }
 
    Ok(())
}

## VRF ACCOUNTS
[[test.validator.clone]] ## sbv2 attestation programID
address = "sbattyXrzedoNATfc4L31wC9Mhxsi1BmFhTiN8gDshx"
 
[[test.validator.clone]] ## sbv2 attestation IDL
address = "5ExuoQR69trmKQfB95fDsUGsUrrChbGq9PFgt8qouncz"
 
[[test.validator.clone]] ## sbv2 SbState
address = "CyZuD7RPDcrqCGbNvLCyqk6Py9cEZTKmNKujfPi3ynDd"

import * as anchor from "@coral-xyz/anchor";
import { Program } from "@coral-xyz/anchor";
import { BurryEscrow } from "../target/types/burry_escrow";
import { Big } from "@switchboard-xyz/common";
import {
  AggregatorAccount,
  AnchorWallet,
  SwitchboardProgram,
  SwitchboardTestContext,
  Callback,
  PermissionAccount,
} from "@switchboard-xyz/solana.js";
import { NodeOracle } from "@switchboard-xyz/oracle";
import { assert } from "chai";
 
export const solUsedSwitchboardFeed = new anchor.web3.PublicKey(
  "GvDMxPzN1sCj7L26YDK2HnMRXEQmQ2aemov8YBtPS7vR",
);
 
function delay(ms: number) {
  return new Promise(resolve => setTimeout(resolve, ms));
}
 
describe("burry-escrow-vrf", () => {
  // Configure the client to use the local cluster.
  anchor.setProvider(anchor.AnchorProvider.env());
  const provider = anchor.AnchorProvider.env();
  const program = anchor.workspace.BurryEscrow as Program<BurryEscrow>;
  const payer = (provider.wallet as AnchorWallet).payer;
 
  it("Create Burry Escrow Above Price", async () => {
    // fetch switchboard devnet program object
    const switchboardProgram = await SwitchboardProgram.load(
      "devnet",
      new anchor.web3.Connection("https://api.devnet.solana.com"),
      payer,
    );
    const aggregatorAccount = new AggregatorAccount(
      switchboardProgram,
      solUsedSwitchboardFeed,
    );
 
    // derive escrow state account
    const [escrowState] = await anchor.web3.PublicKey.findProgramAddressSync(
      [Buffer.from("MICHAEL BURRY"), payer.publicKey.toBuffer()],
      program.programId,
    );
    console.log("Escrow Account: ", escrowState.toBase58());
 
    // fetch latest SOL price
    const solPrice: Big | null = await aggregatorAccount.fetchLatestValue();
    if (solPrice === null) {
      throw new Error("Aggregator holds no value");
    }
    const failUnlockPrice = solPrice.plus(10).toNumber();
    const amountToLockUp = new anchor.BN(100);
 
    // Send transaction
    try {
      const tx = await program.methods
        .deposit(amountToLockUp, failUnlockPrice)
        .accounts({
          user: payer.publicKey,
          escrowAccount: escrowState,
          systemProgram: anchor.web3.SystemProgram.programId,
        })
        .signers([payer])
        .rpc();
 
      await provider.connection.confirmTransaction(tx, "confirmed");
      console.log("Your transaction signature", tx);
 
      // Fetch the created account
      const newAccount = await program.account.escrowState.fetch(escrowState);
 
      const escrowBalance = await provider.connection.getBalance(
        escrowState,
        "confirmed",
      );
      console.log("Onchain unlock price:", newAccount.unlockPrice);
      console.log("Amount in escrow:", escrowBalance);
 
      // Check whether the data onchain is equal to local 'data'
      assert(failUnlockPrice == newAccount.unlockPrice);
      assert(escrowBalance > 0);
    } catch (e) {
      console.log(e);
      assert.fail(e);
    }
  });
 
  it("Attempt to withdraw while price is below UnlockPrice", async () => {
    let didFail = false;
 
    // derive escrow address
    const [escrowState] = await anchor.web3.PublicKey.findProgramAddressSync(
      [Buffer.from("MICHAEL BURRY"), payer.publicKey.toBuffer()],
      program.programId,
    );
 
    // send tx
    try {
      const tx = await program.methods
        .withdraw()
        .accounts({
          user: payer.publicKey,
          escrowAccount: escrowState,
          feedAggregator: solUsedSwitchboardFeed,
          systemProgram: anchor.web3.SystemProgram.programId,
        })
        .signers([payer])
        .rpc();
 
      await provider.connection.confirmTransaction(tx, "confirmed");
      console.log("Your transaction signature", tx);
    } catch (e) {
      // verify tx returns expected error
      didFail = true;
      console.log(e.error.errorMessage);
      assert(
        e.error.errorMessage ==
          "Current SOL price is not above Escrow unlock price.",
      );
    }
 
    assert(didFail);
  });
});

describe.only("burry-escrow-vrf", () => {
  // Configure the client to use the local cluster.
  anchor.setProvider(anchor.AnchorProvider.env());
  const provider = anchor.AnchorProvider.env()
  const program = anchor.workspace.BurryEscrow as Program<BurryEscrow>;
  const payer = (provider.wallet as AnchorWallet).payer
 
  // ADDED CODE
  let switchboard: SwitchboardTestContext
  let oracle: NodeOracle
 
  before(async () => {
    switchboard = await SwitchboardTestContext.loadFromProvider(provider, {
      name: "Test Queue",
      // You can provide a keypair to so the PDA schemes dont change between test runs
      // keypair: SwitchboardTestContext.loadKeypair(SWITCHBOARD_KEYPAIR_PATH),
      queueSize: 10,
      reward: 0,
      minStake: 0,
      oracleTimeout: 900,
      // aggregators will not require PERMIT_ORACLE_QUEUE_USAGE before joining a queue
      unpermissionedFeeds: true,
      unpermissionedVrf: true,
      enableBufferRelayers: true,
      oracle: {
        name: "Test Oracle",
        enable: true,
        // stakingWalletKeypair: SwitchboardTestContext.loadKeypair(STAKING_KEYPAIR_PATH),
      },
    })
 
    oracle = await NodeOracle.fromReleaseChannel({
      chain: "solana",
      // use the latest testnet (devnet) version of the oracle
      releaseChannel: "testnet",
      // disables production capabilities like monitoring and alerts
      network: "localnet",
      rpcUrl: provider.connection.rpcEndpoint,
      oracleKey: switchboard.oracle.publicKey.toBase58(),
      // path to the payer keypair so the oracle can pay for txns
      secretPath: switchboard.walletPath,
      // set to true to suppress oracle logs in the console
      silent: false,
      // optional env variables to speed up the workflow
      envVariables: {
        VERBOSE: "1",
        DEBUG: "1",
        DISABLE_NONCE_QUEUE: "1",
        DISABLE_METRICS: "1",
      },
    })
 
    switchboard.oracle.publicKey
 
    // start the oracle and wait for it to start heartbeating onchain
    await oracle.startAndAwait()
  })
 
  after(() => {
    oracle?.stop()
  })
 
// ... rest of code
}

it("Roll till you can withdraw", async () => {
  // derive escrow address
  const [escrowState] = await anchor.web3.PublicKey.findProgramAddressSync(
    [Buffer.from("MICHAEL BURRY"), payer.publicKey.toBuffer()],
    program.programId,
  );
 
  const vrfSecret = anchor.web3.Keypair.generate();
  const [vrfClientKey] = anchor.web3.PublicKey.findProgramAddressSync(
    [
      Buffer.from("VRFCLIENT"),
      payer.publicKey.toBytes(),
      escrowState.toBytes(),
      vrfSecret.publicKey.toBytes(),
    ],
    program.programId,
  );
  console.log(`VRF Client: ${vrfClientKey}`);
 
  const vrfIxCoder = new anchor.BorshInstructionCoder(program.idl);
  const vrfClientCallback: Callback = {
    programId: program.programId,
    accounts: [
      // ensure all accounts in consumeRandomness are populated
      // { pubkey: payer.publicKey, isSigner: false, isWritable: true },
      { pubkey: escrowState, isSigner: false, isWritable: true },
      { pubkey: vrfClientKey, isSigner: false, isWritable: true },
      { pubkey: vrfSecret.publicKey, isSigner: false, isWritable: true },
    ],
    ixData: vrfIxCoder.encode("consumeRandomness", ""), // pass any params for instruction here
  };
 
  const queue = await switchboard.queue.loadData();
 
  // Create Switchboard VRF and Permission account
  const [vrfAccount] = await switchboard.queue.createVrf({
    callback: vrfClientCallback,
    authority: vrfClientKey, // vrf authority
    vrfKeypair: vrfSecret,
    enable: !queue.unpermissionedVrfEnabled, // only set permissions if required
  });
 
  // vrf data
  const vrf = await vrfAccount.loadData();
 
  console.log(`Created VRF Account: ${vrfAccount.publicKey}`);
 
  // derive the existing VRF permission account using the seeds
  const [permissionAccount, permissionBump] = PermissionAccount.fromSeed(
    switchboard.program,
    queue.authority,
    switchboard.queue.publicKey,
    vrfAccount.publicKey,
  );
 
  const [payerTokenWallet] =
    await switchboard.program.mint.getOrCreateWrappedUser(
      switchboard.program.walletPubkey,
      { fundUpTo: 1.0 },
    );
 
  // initialize vrf client
  try {
    const tx = await program.methods
      .initVrfClient()
      .accounts({
        user: payer.publicKey,
        escrowAccount: escrowState,
        vrfState: vrfClientKey,
        vrf: vrfAccount.publicKey,
        systemProgram: anchor.web3.SystemProgram.programId,
      })
      .signers([payer])
      .rpc();
  } catch (e) {
    console.log(e);
    assert.fail();
  }
 
  let rolledDoubles = false;
  while (!rolledDoubles) {
    try {
      // Request randomness and roll dice
      const tx = await program.methods
        .getOutOfJail({
          switchboardStateBump: switchboard.program.programState.bump,
          permissionBump,
        })
        .accounts({
          vrfState: vrfClientKey,
          vrf: vrfAccount.publicKey,
          user: payer.publicKey,
          payerWallet: payerTokenWallet,
          escrowAccount: escrowState,
          oracleQueue: switchboard.queue.publicKey,
          queueAuthority: queue.authority,
          dataBuffer: queue.dataBuffer,
          permission: permissionAccount.publicKey,
          switchboardEscrow: vrf.escrow,
          programState: switchboard.program.programState.publicKey,
 
          switchboardProgram: switchboard.program.programId,
          recentBlockhashes: anchor.web3.SYSVAR_RECENT_BLOCKHASHES_PUBKEY,
          tokenProgram: anchor.utils.token.TOKEN_PROGRAM_ID,
          systemProgram: anchor.web3.SystemProgram.programId,
        })
        .signers([payer])
        .rpc();
 
      await provider.connection.confirmTransaction(tx, "confirmed");
      console.log(`Created VrfClient Account: ${vrfClientKey}`);
 
      // wait a few sec for switchboard to generate the random number and invoke callback ix
      console.log("Rolling Die...");
 
      let didUpdate = false;
      let vrfState = await program.account.vrfClientState.fetch(vrfClientKey);
 
      while (!didUpdate) {
        console.log("Checking die...");
        vrfState = await program.account.vrfClientState.fetch(vrfClientKey);
        didUpdate = vrfState.timestamp.toNumber() > 0;
        await delay(1000);
      }
 
      console.log(
        "Roll results - Die 1:",
        vrfState.dieResult1,
        "Die 2:",
        vrfState.dieResult2,
      );
      if (vrfState.dieResult1 == vrfState.dieResult2) {
        rolledDoubles = true;
      } else {
        console.log("Resetting die...");
        await delay(5000);
      }
    } catch (e) {
      console.log(e);
      assert.fail();
    }
  }
 
  const tx = await program.methods
    .withdraw()
    .accounts({
      user: payer.publicKey,
      escrowAccount: escrowState,
      feedAggregator: solUsedSwitchboardFeed,
      systemProgram: anchor.web3.SystemProgram.programId,
    })
    .signers([payer])
    .rpc();
 
  await provider.connection.confirmTransaction(tx, "confirmed");
});

const [payerTokenWallet] =
  await switchboard.program.mint.getOrCreateWrappedUser(
    switchboard.program.walletPubkey,
    { fundUpTo: 1.0 },
  );